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United States Patent | 5,578,839 |
Nakamura ,   et al. | November 26, 1996 |
A light-emitting gallium nitride-based compound semiconductor device of a double-heterostructure. The double-heterostructure includes a light-emitting layer formed of a low-resistivity In.sub.x Ga.sub.1-x N (0<x<1) compound semiconductor doped with p-type and/or n-type impurity. A first clad layer is joined to one surface of the light-emitting layer and formed of an n-type gallium nitride-based compound semiconductor having a composition different from the light-emitting layer. A second clad layer is joined to another surface of the light-emitting layer and formed of a low-resistivity, p-type gallium nitride-based compound semiconductor having a composition different from the light-emitting layer.
Inventors: | Nakamura; Shuji (Anan, JP); Mukai; Takashi (Anan, JP); Iwasa; Naruhito (Anan, JP) |
Assignee: | Nichia Chemical Industries, Ltd. (JP) |
Appl. No.: | 153153 |
Filed: | November 17, 1993 |
Nov 20, 1992[JP] | 4-335556 | |
Jan 08, 1993[JP] | 5-018122 | |
Jan 08, 1993[JP] | 5-018123 | |
Mar 05, 1993[JP] | 5-070873 | |
Mar 05, 1993[JP] | 5-070874 | |
May 17, 1993[JP] | 5-114542 | |
May 17, 1993[JP] | 5-114543 | |
May 17, 1993[JP] | 5-114544 |
Current U.S. Class: | 257/96; 257/101; 257/201; 257/613; 257/E33.028; 257/E33.03; 257/E33.043; 257/E33.049 |
Intern'l Class: | H01L 033/00 |
Field of Search: | 257/79,94,96,101,102,103,201,609,613,615 |
5237182 | Aug., 1993 | Kitagawa et al. | 257/15. |
5323027 | Jun., 1994 | Yamada et al. | 257/96. |
Foreign Patent Documents | |||
0496030 | Jul., 1992 | EP. | |
64-17484 | Jan., 1989 | JP. | |
2-229475 | Sep., 1990 | JP. | |
4-209577 | Jul., 1992 | JP. | |
4-236478 | Aug., 1992 | JP. |
Japanese Journal of Applied Physics, vol. 31, No. 10B, Oct. 15, 1992, Tokyo, Japan, pp. L1457-L1459, S. Nakamura et al., "High-Quality InGaN Films Grown on GaN Films". Patent Abstracts of Japan, vol. 15, No. 470 (E-1139) Nov. 28, 1991 & JP-A-03 203 388 (Matsushita Electric Ind Co Ltd) Sep. 5, 1991 (abstract). Applied Physics Letters, vol. 62, No. 19, May 10, 1993, New York, U.S., pp. 2390-2392, S. Nakamura et al., "High-Power InGaN/GaN Double-Heterostructure Violet Light Emitting Diodes," p. 2390, col. 1, line 1-col. 2, line 21*. |